The realization of truly unclonable identification and authentication tags is the key factor in protecting the global economy from an ever-increasing number of counterfeit attacks. Here, we report on the demonstration of nanoscale tags that exploit the electromechanical spectral signature as a fingerprint that is characterized by inherent randomness in fabrication processing. Benefiting from their ultraminiaturized size and transparent constituents, these clandestine nanoelectromechanical tags provide substantial immunity to physical tampering and cloning. Adaptive algorithms are developed for digital translation of the spectral signature into binary fingerprints. A large set of tags fabricated in the same batch is used to estimate the entropy of the corresponding fingerprints with high accuracy. The tags are also examined under repetitive measurements and temperature variations to verify the consistency of the fingerprints. These experiments highlight the potential of clandestine nanoelectromechanical tags for the realization of secure identification and authentication methodologies applicable to a wide range of products and consumer goods.

实现真正不可克隆的识别和认证标签是保护全球经济免受越来越多的假冒攻击的关键因素。在这里，我们报告了纳米级标签的演示，该标签利用机电光谱特征作为指纹，其特征在于制造过程中的固有随机性。得益于其超小型化的尺寸和透明的成分，这些秘密的纳米机电标签对物理篡改和克隆具有显着的免疫力。自适应算法被开发用于将光谱签名数字转换为二进制指纹。使用同一批制造的大量标签来高精度地估计相应指纹的熵。标签还会在重复测量和温度变化下进行检查，以验证指纹的一致性。这些实验突出了秘密纳米机电标签在实现适用于各种产品和消费品的安全识别和认证方法方面的潜力。